Pitched Roof Trusses

Live loads are not always present.

Pitched roof trusses.

Some common trusses are named according to their web configuration such as the king post fan fink or howe truss. Naturally this truss is used in buildings for creating a pitched roof. A pitched roof construction is the classic old school way of roof construction. With rafters collars ties struts ridges underpurlins ceiling joists hanging beams combination hanging and strutting beams pitching plates and so on.

Its bottom chords join together at the apex creating a pitched or vaulted ceiling. Pre manufactured stock trusses are constructed with spruce pine fir spf or southern yellow pine syp lumber. It is most often used for roof construction. They support live and dead loads by efficiently transferring the loads to the building walls or supports.

A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc. The chord size and web configuration are determined by span load and spacing. A pitched roof uses not only the external wall systems but also particular parts of the internal walls. They are designed at a 4 12 pitch to be spaced 2 foot on center.

Roof trusses are engineered wood alternatives to hand framed rafters. Examples of live loads are snow wind rain and temporary construction loads. The pitched or common truss is characterized by its triangular shape.